Nut-lock.



J. TOBIN.

NUT LOCK.

APPLICATION rum) NOV. 27, 1911.

Patented June 18, 1912.

c ayzu ajojzyz W m abbot/wa e WWW . UNITED STATES PATENT OFFICE.

JAMES TOBIN, OF ST. BONIFACIUS, PENNSYLVANIA.

NUT-LOCK.

To all whom it may concern:

Be it known that I, JAMES TOBIN, a citizen of the United States,residing at St. Bonifacius, in the county of Cambria and State ofPennsylvania, have invented certain new and useful Improvements in Nut-Locks; and I do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same. v

This invention relates to improvements in nut locks.

One object of the invention 'is to provide a nut lock having a simpleand improved construction and arrangement of nut locking mechanism whichmay be readily engaged with the bolt and nut and which when so engagedwill securely hold the nut against turning on the bolt.

l/Vith this and other objects in view, the invention consists of certainnovel features of construction, and the combination and arrangement ofparts as will be more fully described and claimed.

In the accompanying drawings: Figure 1 is a side view of a bolt and nutshowing the invention applied thereto; Fig. 2 is a central longitudinalsection of the same; Fig. 3 is a detail perspective View of the nut;Fig. 4 is a perspective view of the locking member for the nut; and,Fig. 5 is a central longitudinal section of the same.

Referring more particularly to the drawings, 1 denotes the bolt, saidbolt having a squared or irregular outer. end 2. Adapted to be screwedonto the bolt is a nut 3 which may be of any suitable shape and which isprovided on its outer end with a cylindrical extension or nipple 4. Theextension or nipple 4 is threaded interiorly the same as the nut, thethreads in the nipple forming a continuation of the nut threads. Thenipple or extension 4 is also exteriorly threaded with left hand threadsor in the opposite direction from the interior threads thereof. Slidablyengaged with the outer end of the bolt is a nut locking membercomprising a socket or thimble 5 having an open inner end and a closedouter end, said closed outer end being provided with a rectangular orirregularly shaped passage 6 corresponding to the shape of the outer endof the bolt and through which said outer end of the bolt passes when thethimble is engaged therewith. The thimble or Specification of LettersPatent.

Application filed November 27, 1911.

Patented June 18, 1912.

Serial No. 662,668.

sage 6 in the closed outer end of the socket.

When thus engaged the socket or thimble is slipped inwardly on the boltuntil the inner end of the socket comes into engagement with the outerend of the nipple or extension 4 on the nut. When thus engaged the nutis again turned in the proper direction for screwing the same inwardlyon the bolt whereupon the oppositely threaded nipple will screw into thesocket,

thus drawing the same farther inwardly on the squared outer end of thebolt. This engagement of the threaded nipple 4 with the socket holds thelatter in position on the bolt and the engagement of the rectangularpassage in the end of the socket with the squared end of the bolt holdsthe same against turning on the bolt and thus locks the nut in itsadjusted position on the bolt.

From the foregoing description taken in connection with the accompanyingdrawings the construction and operation of the invention will be readilyunderstood without requiring a more extended explanation.

Various changes in the form, proportion and the minor details ofconstruction may be resorted to without departing from the principle orsacrificing any of the advantages of the invention as claimed.

Having thus described my invention, what I claim is:

1. A nut lock comprising a bolt, a nut adapted to be screwed onto thebolt, said nut having on one end an extension, said extension beingthreaded on its outer surface in an opposite direction from the threadsof the bolt, and a locking member having a sliding non-rotatingengagement with the bolt, said member having its inner surface threadedto correspond with the outer threaded surface of the extension on thenut whereby the latter is screwed into the looking member thus lockingthe nut in its adjusted position.

2. In a nut look, a bolt having an irregular outer end a nut adapted tobe screwed adapted to be screwed onto the locking member and the latterthus drawn inwardly on the irregular end of the bolt thereby locking thenut in its adjusted positions.

3. In a nut lock a bolt having a squared outer end, a nut adapted to bescrewed onto the bolt, said nut having on one end a reduced cylindricalextension, said extension being interiorly threaded to correspond withthe threads in the nut and having its outer surface threaded in anopposite direction, a locking member comprising a thimble having in itsclosed outer end a squared passage adapted to fit the squared end of thebolt when the latter is engaged therewith and having its inner surfacethreaded to correspond with the threaded witnesses.

, JAMES TOBIN. Witnesses:

EDWARD F. DIXON, LEO DIXON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, 110.

